I had mine done with 35% all around with a 6 inch eyebrow, and with the black interior It looks a lot darker. It's legal at 40% on the front windows hear in Louisiana, and I haven't had any problems at all and I can see just fine out of all the windows. I also have the problem where my eyes are really sensitive to bright light and have to wear sunglasses constantly, but I only need them when driving into a rising/setting sun with this set-up.